1 Explain that a population pyramid shows the age and sex structure of a population. 2  Point to the horizontal bars, which show the percentage (or the absolute number) of males and females in each age group. 3  Have students interpret the chart.
1 A small-to medium-capacity dehumidifier (11-25 pints) for a living room can run around $100-$250 or more, depending on size and features such as a humidistat to set the desired humidity, auto-shut-off when the tank's full, energy efficiency and quiet operation.
When talking about size, we mean how much moisture the dehumidifier will remove from the air. That is measured in pints. Most companies that make dehumidifiers offer a few different sizes. For instance, Frigidaire offers a 30 pint dehumidifier, a 50 pint dehumidifier and a 70 pint dehumidifier. A dehumidifier used in a very large space or a very damp space needs to be larger than one used in a small space that is not very damp.